## Function

- Generate a table summarizing the structural adequacy for the flanges in beams with longitudinal stiffeners in the cross-section. The table contains two tabs to show the summary for the yielding of the flange plate and the strength of longitudinal flange stiffeners.

## Call

From the main menu, select **[Rating] tab > [Type : Steel Bridge] > [Assessment Code : CS454/20] > [Results] group > [Assessment Result Tables] >**** [Steel Flange Reserve Factor (Beams with L. Stiffeners)]**

## Input

**1. Flange tab**

**Element** : Element ID

**Part** : The i- or j-end of the element, giving the Node ID at that end in square brackets [Node ID]

**Section Type** : Compact or noncompact

**Rating Case** : The relevant Load Combinations for Assessment.

**Comp./Tens.** : The stress condition in flanges (Compression/Tension).

**Sig_yf** : The nominal yield stress for the flange material.

**Sig_f_SV** : The longitudinal stress at the mid-plane of the flange plate due to SV load model.

**Tau_SV** : The summation of the shear stress (Clause 9.10.2.1, BS5400:3) due to SV load model.

**Sig_f_DL** : The longitudinal stress at the mid-plane of the flange plate due to combined dead load and superimposed dead load.

**Tau_DL** : The summation of the shear stress (Clause 9.10.2.1, BS5400:3) due to combined dead load and superimposed dead load.

**Sig_f_ST** : The longitudinal stress at the mid-plane of the flange plate due to ALL Model 2 loading.

**Tau_ST** : The summation of the shear stress (Clause 9.10.2.1, BS5400:3) due to ALL Model 2 loading.

**A** : Structural Adequacy – calculated as the assessment resistance over the assessment load effects (RA*/SA*).

**Psi** : Reserve Factor against a special vehicle load model with the associated standard vehicle loading. The symbol hyphen (-) is shown when the shear directions are different between resistance and shear force due to special vehicle.

**Psi*** : Reserve Factor against a special vehicle load model without the associated standard vehicle loading. The symbol hyphen (-) is shown when the shear directions are different between resistance and shear force due to special vehicle.

**Check** : An overall indication whether the section passed all checks and is OK or Not Good (NG)

Structural adequacy (A), Psi, and Psi* are calculated as follows. The value of Sig_2 is assumed to be zero.

Psi x S* + SD* + SST* = RA*, Psi is determined with back-calculation from the equation.

Psi* x S* + SD* = RA*, Psi* is determined with back-calculation from the equation.

**2. Stiffener tab**

**Element** : Element ID

**Part** : The i- or j-end of the element, giving the Node ID at that end in square brackets [Node ID]

**Rating Case** : The relevant Load Combinations for Assessment.

**Stiffener/Flange** : Components for the assessment.

**k_l** : The value of the reduction factor.

**Sig_y** : The nominal yield stress for the stiffener material or the flange plate material.

**Sig_a_SV** : The longitudinal stress at the centroid of the effective section of the stiffener due to SV load model.

**Tau_1_SV** : The in-plane shear stress in the flange plate due to torsion of SV load model.

**Sig_a_DL** : The longitudinal stress at the centroid of the effective section of the stiffener due to combined dead load and superimposed dead load.

**Tau_1_DL** : The in-plane shear stress in the flange plate due to combined dead load and superimposed dead load.

**Sig_a_ST** : The longitudinal stress at the centroid of the effective section of the stiffener due to ALL Model 2 loading.

**Tau_1_ST** : The in-plane shear stress in the flange plate due to ALL Model 2 loading.

**A** : Structural Adequacy – calculated as the assessment resistance over the assessment load effects (RA*/SA*).

**Psi** : Reserve Factor against a special vehicle load model with the associated standard vehicle loading. The symbol hyphen (-) is shown when the shear directions are different between resistance and shear force due to special vehicle.

**Psi*** : Reserve Factor against a special vehicle load model without the associated standard vehicle loading. The symbol hyphen (-) is shown when the shear directions are different between resistance and shear force due to special vehicle.

**Check** : An overall indication whether the section passed all checks and is OK or Not Good (NG).

Structural adequacy (A), Psi, and Psi* are calculated as follows.

Psi x S* + SD* + SST* = RA*, Psi is determined with back-calculation from the equation.

Psi* x S* + SD* = RA*, Psi* is determined with back-calculation from the equation.